108 INDEX. 



PAGE 



Dust, harmful effects of, on the eyes ...... 52 



" in inhaled air, disposal of, by body ..... 37 



" " public conveyances . ...... 84 



" " theatres, or as means of conveyance of disease . . .81 



" " railway carriages as source of danger ..... 85 



" in-doors, danger of infection from ...... 76 



" inorganic elements of ....... 4 



" " " " as causes of disease . . . .51 



" lodgment of, in tissues of lungs . . . . ... 44 



" materials composing ........ 3 



" metallic ......... 4 



" mode of occurrence of bacteria in .... 8 



" out-of-doors, micro-organisms in . . . . . .20 



" relations of, to catarrh . . . . . . . -52 



" removal of, from houses ....... 77 



" safeguards of body against ....... 36 



" settling of, in-doors ........ 22 



" significance of, in causing disease ...... 50 



" sweeping away of, by ciliated cells ..... 39 



" street-, dangers of infection from ..... 75 



" tenacious clinging of, to fabrics ...... 29 



" tobacco- ......... 5 



" tubercle bacilli in . . . . . . .66 



" two modes of freeing air from ...... too 



" woollen . .... ... .5 



Dusting .......... 78 



Elevated R. R. in New York as source of annoyance and danger from dust 52 

 Erysipelas .......... 55 



Evolution, failure of, to eliminate the porcine element in street loafers . 98 

 Expectoration as a common vice . . . . . 97 



" dangers of, in consumptives . . . . .61 



Eyes, harmful effects of dust on . . . . . . .52 



Filters, air-, in biological air analysis ...... 13-15 



" dust-, lymph-glands in lungs as . . . . . .46 



Filthy cities, no necessity for . . . . . .90 



Filtration method of air analysis ....... 15 



General knowledge, necessary to prevent spread of bacterial diseases by dust 89 

 Germs, aerial modes of study of. . . . . . . 11-13 



